Liquid cooling pipeline and energy storage system

Abstract

The utility model relates to a liquid cooling pipeline energy storage system, a liquid cooling pipeline comprises a liquid outlet pipeline, the liquid outlet pipeline comprises a liquid outlet branch pipe and a visible pipe, the liquid outlet branch pipe is provided with a bottom and a top, the bottom of the liquid outlet branch pipe is used for communicating with a liquid return port of a liquid cooling unit, and the liquid outlet branch pipe is also used for communicating with liquid outlets of a plurality of cooling pipelines in a battery cluster. The liquid outlet branch pipe and the visible pipe are arranged in parallel, and one end of the visible pipe is communicated with the top of the liquid outlet branch pipe. According to the liquid cooling pipeline, the visible pipe and the liquid outlet branch pipe are arranged in parallel, and the visible pipe is communicated with the top of the liquid outlet branch pipe, so that the liquid level condition and the bubble condition in the liquid cooling pipeline can be observed through the visible pipe. Therefore, when the battery cluster is formed by arranging a plurality of battery packs provided with cooling pipelines up and down, and the height of the top of the liquid outlet branch pipe in the arrangement direction of the plurality of battery packs is equal to or higher than the height of the liquid outlet corresponding to the battery pack located at the uppermost layer; whether the liquid cooling pipeline is filled with the cooling liquid or not and whether the air trapping phenomenon exists or not can be judged through the visible pipe.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a liquid cooling pipeline and an energy storage system. Background Art

[0002] The energy storage system is internally provided with multiple groups of battery clusters arranged side by side. Each battery cluster is composed of multiple battery packs arranged up and down. The battery packs will generate a certain amount of heat during operation. In order to ensure the normal operation of each battery pack, when assembling the energy storage system, it is necessary to fill the liquid cooling pipeline through the liquid filling port of the liquid cooling unit, so that the liquid cooling pipeline can pass the coolant into the cooling pipeline of each battery pack in the energy storage system, thereby cooling each battery pack. Generally, since the liquid filling port of the liquid cooling unit is located lower than the position of the battery pack located at the top layer in the energy storage system, it is easy to form air entrapment in the upper part of the liquid cooling pipeline during the process of filling the liquid cooling pipeline, resulting in the coolant failing to completely fill the liquid cooling pipeline, affecting the thermal management effect of the energy storage system.

[0003] At present, one of the common ways to judge whether the liquid cooling pipe is filled with coolant is the amount of liquid injection. However, since this judgment depends on the experience of the operator, the human influence is relatively large, which is not conducive to ensuring the effect of liquid injection. Summary of the invention

[0004] Based on this, it is necessary to provide a liquid cooling pipeline and energy storage system that can easily and accurately determine whether the coolant is full to address the above-mentioned problems.

[0005] A liquid cooling pipeline, comprising:

[0006] A liquid outlet pipeline, the liquid outlet pipeline includes a liquid outlet branch pipe and a visual tube, the liquid outlet branch pipe has a bottom and a top, the bottom of the liquid outlet branch pipe is used to communicate with the return liquid port of the liquid cooling unit, the liquid outlet branch pipe is also used to connect the liquid outlets of multiple cooling pipes in the battery cluster, the liquid outlet branch pipe is arranged in parallel with the visual tube, and one end of the visual tube is connected to the top of the liquid outlet branch pipe.

[0007] In the above-mentioned liquid cooling pipe, since the liquid outlet branch pipe is arranged in parallel with the visual tube, and the visual tube is connected to the top of the liquid outlet branch pipe, the liquid level and bubble situation inside the liquid cooling pipe can be easily observed through the visual tube. Therefore, when the battery cluster is formed by a plurality of battery packs provided with cooling pipes arranged up and down, and the height of the top of the liquid outlet branch pipe in the arrangement direction of the plurality of battery packs is equal to or higher than the height of the liquid outlet corresponding to the battery pack located at the top layer in the battery cluster, during the liquid filling process, the operator can intuitively and accurately judge whether the coolant fills the liquid cooling pipe and whether there is air entrapment in the liquid cooling pipe through the visual tube, thereby ensuring the reliability of the liquid filling and the cooling effect of the battery pack. In addition, during the after-sales inspection process, it is also possible to intuitively observe and judge whether the liquid cooling pipe needs to be replenished and whether there is leakage in the liquid cooling pipe through the visual tube, which helps to improve the inspection efficiency.

[0008] The technical solution is further described below:

[0009] In one embodiment, the inner diameter of the viewing tube is smaller than the inner diameter of the liquid outlet branch pipe.

[0010] In one embodiment, the liquid outlet pipeline also includes a plurality of liquid outlet branch pipes, which are arranged at intervals along the extension direction of the liquid outlet branch pipe and are all connected to the liquid outlet branch pipe, and the plurality of liquid outlet branch pipes are connected to the liquid outlets of the plurality of cooling pipes in a one-to-one correspondence.

[0011] In one embodiment, the liquid outlet pipeline further includes a liquid return quick intubation tube, one end of which is connected to the bottom of the liquid outlet branch pipe, and the other end is provided with a liquid return quick plug, and the liquid return quick plug is connected to the liquid return port.

[0012] In one embodiment, the liquid cooling pipeline also includes a liquid inlet pipeline, which includes a liquid inlet branch pipe and a detection tube. The liquid inlet branch pipe has a bottom end and a top end. The bottom end of the liquid outlet branch pipe is used to connect with the liquid filling port of the liquid cooling unit. The liquid inlet branch pipe is also used to connect with the liquid inlets of the multiple cooling pipes. The top end of the liquid inlet branch pipe is connected with the detection tube, and the detection tube is provided with an observation window.

[0013] In one of the embodiments, a liquid level sensor is provided in the detection tube, and the liquid level sensor is electrically connected to the liquid cooling unit. When the liquid level sensor detects that the liquid level of the coolant in the liquid inlet pipeline is lower than a predetermined height, the liquid cooling unit can control the liquid cooling unit to inject liquid into the liquid cooling pipeline.

[0014] In one embodiment, the liquid level sensor is also used to be electrically connected to a battery management system, and the liquid level sensor can control the battery management system to send a warning signal when the liquid cooling unit continues to inject liquid into the liquid cooling pipe and the liquid level is maintained below the predetermined height.

[0015] In one embodiment, the liquid inlet pipeline also includes a plurality of liquid inlet branch pipes, which are arranged at intervals along the extension direction of the liquid outlet branch pipe and are all connected to the liquid inlet branch pipe, and the plurality of liquid inlet branch pipes are connected to the liquid inlets of the plurality of cooling pipes in a one-to-one correspondence.

[0016] In one embodiment, the liquid inlet pipeline also includes a liquid injection quick cannula, one end of which is connected to the bottom end of the liquid inlet branch pipe, and the other end is provided with a liquid injection quick plug, and the liquid injection quick plug is connected to the liquid injection port.

[0017] A energy storage system comprises a cabin, a plurality of battery clusters, a plurality of liquid cooling units and a plurality of the above-mentioned liquid cooling pipes, wherein the cabin is formed with a prefabricated cabin, the battery cluster comprises a plurality of battery packs arranged vertically, a cooling pipe is arranged in the battery pack, the plurality of battery clusters are arranged in parallel in the prefabricated cabin, the plurality of liquid cooling units are all arranged in the prefabricated cabin, and the plurality of liquid cooling units are arranged one by one at the bottom of the plurality of battery clusters, the liquid outlets of the plurality of cooling pipes in the same battery cluster are connected to the liquid return port of the liquid cooling unit corresponding to the battery cluster through the liquid outlet branch pipe in the same liquid cooling pipe, and in the direction in which the plurality of battery packs are arranged vertically, the height of the top of the liquid outlet branch pipe is equal to or higher than the height of the liquid outlet corresponding to the battery pack located at the topmost layer in the battery cluster corresponding to the liquid outlet branch pipe.

[0018] In the above-mentioned energy storage system, since each liquid outlet branch pipe is arranged in parallel with a visual tube, and the visual tube is connected to the top of the corresponding liquid outlet branch pipe, the liquid level and bubble conditions inside the corresponding liquid cooling pipe can be observed through each visual tube. Since the height of the top of the liquid outlet branch pipe in the arrangement direction of the multiple battery packs is equal to or higher than the height of the liquid outlet corresponding to the battery pack located at the top layer in the corresponding battery cluster, during the liquid filling process, the operator can intuitively and accurately judge whether the coolant fills the corresponding liquid cooling pipe and whether there is air entrapment in the corresponding liquid cooling pipe through the visual tube, thereby ensuring the reliability of liquid filling. In addition, during the after-sales inspection process, it is also possible to intuitively observe and judge whether the corresponding liquid cooling pipe needs to be replenished and whether leakage occurs in the corresponding liquid cooling pipe through the visual tube, which helps to improve the inspection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements are drawn only as examples in the drawings and are not necessarily drawn according to the true scale.

[0022] FIG1 is a schematic diagram of the structure of an energy storage system in one embodiment of the present application.

[0023] FIG. 2 is a schematic diagram of the front view of the structure of the energy storage system behind the hidden cabin in one embodiment of the present application.

[0024] FIG. 3 is a schematic diagram of the structure of a liquid outlet branch in an embodiment of the present application.

[0025] FIG. 4 is a schematic diagram of a local enlarged structure of the structure shown in FIG. 3 at point A. FIG.

[0026] FIG. 5 is a schematic diagram of the structure of a liquid inlet branch pipe in an embodiment of the present application.

[0027] FIG. 6 is a schematic diagram of a local enlarged structure of the structure shown in FIG. 5 at position B. FIG.

[0028] Reference numerals

[0029] 100, energy storage system; 101, cabin; 102, battery pack; 102a, battery cluster; 103, liquid cooling unit; 103a, liquid filling port; 103b, liquid return port; 200, liquid cooling pipeline; 210, liquid outlet pipeline; 211, liquid outlet branch pipe; 211a, first three-way pipe; 221b, first connecting pipe; 212, liquid outlet branch pipe; 213, liquid return quick plug; 213a, liquid return quick plug; 214, visual tube; 220, liquid inlet pipeline; 221, liquid inlet branch pipe; 221a, second three-way pipe; 221b, second connecting pipe; 222, liquid inlet branch pipe; 223, liquid injection quick plug; 223a, liquid injection quick plug; 224, detection tube; 224a, observation window. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0032] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0034] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0036] 1 and 2, 3 and 4, an embodiment of the present application provides a liquid cooling pipe 200, including a liquid outlet pipe 210, the liquid outlet pipe 210 including a liquid outlet branch pipe 211 and a visual tube 214, the liquid outlet branch pipe 211 having a bottom and a top, the bottom of the liquid outlet branch pipe 211 is used to communicate with the liquid return port 103b of the liquid cooling unit 103, the liquid outlet branch pipe 211 is also used to connect the liquid outlets of multiple cooling pipes in the battery cluster 102a, the liquid outlet branch pipe 211 and the visual tube 214 are arranged in parallel, and one end of the visual tube 214 is connected to the top of the liquid outlet branch pipe 211.

[0037] In the above-mentioned liquid cooling pipe 200, since the liquid outlet branch pipe 211 is arranged in parallel with the visual tube 214, and the visual tube 214 is connected to the top of the liquid outlet branch pipe 211, the liquid level and the bubble situation inside the liquid cooling pipe 200 can be easily observed through the visual tube 214. Therefore, when the battery cluster 102a is formed by a plurality of battery packs 102 provided with cooling pipes arranged up and down, and the height of the top of the liquid outlet branch pipe 211 in the arrangement direction of the plurality of battery packs 102 is equal to or higher than the height of the liquid outlet corresponding to the battery pack 102 located at the top layer in the battery cluster 102a, during the liquid filling process, the operator can intuitively and accurately judge whether the coolant fills the liquid cooling pipe 200 and whether there is trapped air in the liquid cooling pipe 200 through the visual tube 214, thereby ensuring the reliability of liquid filling and the cooling effect of the battery pack 102. In addition, during the after-sales inspection process, it is also possible to visually observe and determine through the visual tube 214 whether the liquid cooling pipe 200 needs to be replenished and whether there is leakage in the liquid cooling pipe 200, thereby helping to improve the inspection efficiency.

[0038] In one embodiment, as shown in Figure 4, the inner diameter of the visual tube 214 is smaller than the inner diameter of the liquid outlet branch 211. In this way, the visual tube 214 can better reflect the liquid level in the liquid cooling pipe 200, thereby helping to ensure the reliability of liquid injection.

[0039] In one embodiment, as shown in FIG3 , the liquid outlet pipeline 210 further includes a plurality of liquid outlet branches 212, which are arranged at intervals along the extension direction of the liquid outlet branch 211 and are all connected to the liquid outlet branch 211, and the plurality of liquid outlet branches 212 are connected to the liquid outlets of the plurality of cooling pipes in a one-to-one correspondence. In this way, it can be ensured that the coolant in the cooling pipe corresponding to each battery pack 102 can all flow back to the liquid cooling unit 103, so as to ensure uniform cooling between each battery pack 102, avoid temperature differences between each battery pack 102, and ensure the normal operation of the battery pack 102.

[0040] Optionally, as shown in Figure 3, the liquid outlet branch pipe 211 can be formed by a plurality of first connecting pipes 221b connected in sequence, wherein two adjacent first connecting pipes 221b are connected to the corresponding liquid outlet branch pipe 212 via a first three-way pipe 211a, so that the liquid outlet branch pipe 212 can be connected to the liquid outlet branch pipe 211, so as to collect the coolant in the cooling pipe in the liquid outlet branch pipe 211, and then return it to the liquid cooling unit 103.

[0041] Furthermore, in one embodiment, as shown in FIG3 , the liquid outlet pipeline 210 further includes a liquid return quick insert 213, one end of which is connected to the bottom of the liquid outlet branch pipe 211, and the other end is provided with a liquid return quick plug 213a, and the liquid return quick plug 213a is connected to the liquid return port 103b. In this way, when assembling the liquid cooling unit 103 and the liquid cooling pipeline 200, the liquid outlet branch pipe 211 and the liquid cooling unit 103 can be quickly connected through the liquid return quick insert 213, which is conducive to improving the assembly efficiency.

[0042] In one embodiment, in combination with Figures 2, 5 and 6, the liquid cooling pipe 200 also includes a liquid inlet pipeline 220, the liquid inlet pipeline 220 includes a liquid inlet branch pipe 221 and a detection tube 224, the liquid inlet branch pipe 221 has a bottom end and a top end, the bottom end of the liquid outlet branch pipe 211 is used to communicate with the liquid filling port 103a of the liquid cooling unit 103, the liquid inlet branch pipe 221 is also used to connect the liquid inlets of multiple cooling pipes, the top end of the liquid inlet branch pipe 221 is connected to the detection tube 224, and the detection tube 224 is provided with an observation window 224a. In this way, the liquid inlet branch pipe 221 connects the liquid filling port 103a of the liquid cooling unit 103 with the liquid inlet of the cooling pipe of each battery pack 102 in the battery cluster 102a, and the liquid outlet branch pipe 211 connects the liquid outlet of the cooling pipe in each battery pack 102 and the liquid return port 103b in the liquid cooling unit 103, so that the coolant in the liquid cooling unit 103 can flow into the liquid inlet pipeline 220 through the liquid filling port 103a, and then flow into the cooling pipe of each battery pack 102, and the coolant in each battery pack 102 flows back to the liquid cooling unit 103 through the liquid outlet branch pipe 211, so that the coolant can cool down each battery pack 102 and ensure the normal operation of the battery pack 102. Since a detection tube 224 is provided at the top of the liquid inlet branch pipe 221, and an observation window 224a is provided on the detection tube 224, the liquid filling and bubble situation of the liquid cooling pipe 200 can be conveniently observed through the observation window 224a in the detection tube 224. Therefore, when the height of the detection tube 224 in the arrangement of multiple battery rows is equal to or higher than the liquid inlet corresponding to the battery pack 102 located at the top layer of the battery cluster 102a, during the liquid filling process, the observation window 224a in the detection tube 224 can be used to determine whether the coolant fills the liquid cooling pipe 200 and whether there is air entrapment in the liquid cooling pipe 200, thereby ensuring the reliability of the liquid filling and the cooling effect of the battery pack 102. In addition, during the after-sales inspection process, it is also possible to visually observe and determine whether liquid replenishment is needed and whether coolant leakage occurs through the observation window 224a, thereby helping to improve the inspection efficiency.

[0043] In one embodiment, as shown in combination with FIG. 2 and FIG. 6 , a liquid level sensor is provided in the detection tube 224, and the liquid level sensor is electrically connected to the liquid cooling unit 103. When the liquid level sensor detects that the liquid level of the coolant in the liquid inlet pipeline 220 is lower than a predetermined height, the liquid cooling unit 103 is controlled to inject liquid into the liquid cooling pipe 200. In this way, when the liquid level sensor detects that the coolant consumption is reduced, the liquid cooling unit 103 can automatically perform the liquid replenishment action and replenish the liquid cooling pipe 200 in a timely and accurate manner, thereby ensuring that each battery pack 102 can be cooled by the coolant and the reliability of the operation of the battery pack 102 is ensured.

[0044] Furthermore, in one embodiment, the liquid level sensor is also used to be electrically connected to the battery management system, and the liquid level sensor can control the battery management system to send a warning signal when the liquid cooling unit 103 continues to inject liquid into the liquid cooling pipe 200 and the liquid level is maintained below a predetermined height. In this way, the staff can determine that the liquid filling cannot be completed through the automatic liquid filling operation based on the received warning signal, and then manually check the liquid cooling pipe 200 to quickly perform manual liquid filling or leak detection.

[0045] Furthermore, in one embodiment, as shown in combination with FIG. 5 and FIG. 6 , the liquid inlet pipeline 220 further includes a plurality of liquid inlet branch pipes 222, which are arranged at intervals along the extension direction of the liquid outlet branch pipe 211 and are all connected to the liquid inlet branch pipe 221, and the plurality of liquid inlet branch pipes 222 are connected to the liquid inlets of the plurality of cooling pipes in a one-to-one correspondence. In this way, the coolant in the liquid inlet branch pipe 211 can flow into the cooling pipe of each battery pack 102, so as to ensure uniform cooling between each battery pack 102, avoid temperature differences between each battery pack 102, and ensure the normal operation of the battery pack 102.

[0046] Optionally, as shown in Figure 5, the liquid inlet branch pipe 221 can be formed by a plurality of second connecting pipes 221b connected in sequence, wherein two adjacent second connecting pipes 221b are connected to the corresponding liquid inlet branch pipe 222 via a second three-way pipe 221a, so that the liquid inlet branch pipe 221 can be connected to the liquid inlet branch pipe 222 to transport the coolant to the cooling pipe of the battery pack 102 through the liquid inlet branch pipe 222.

[0047] In one embodiment, as shown in FIG5 , the liquid inlet pipeline 220 further includes a liquid injection quick insert 223, one end of which is connected to the bottom end of the liquid inlet branch pipe 221, and the other end is provided with a liquid injection quick plug 223a, which is connected to the liquid injection port 103a. In this way, when the liquid inlet branch pipe 211 and the liquid cooling unit 102 are assembled, the liquid inlet branch pipe 221 can be quickly connected to the liquid injection port 103a in the liquid cooling assembly through the liquid injection quick insert 223, thereby facilitating the improvement of assembly efficiency.

[0048] Referring to FIGS. 1 to 6 , an embodiment of the present application further provides an energy storage system 100, the energy storage device comprising a cabin 101, a plurality of battery clusters 102a, a plurality of liquid cooling units 103 and a plurality of liquid cooling pipes 200 in any of the above embodiments, the cabin 101 is formed with a prefabricated cabin, the battery cluster 102a comprises a plurality of battery packs 102 arranged in an up-and-down arrangement, a cooling pipe is arranged in the battery pack 102, a plurality of battery clusters 102a are arranged in parallel in the prefabricated cabin, a plurality of liquid cooling units 103 are arranged in the prefabricated cabin, and a plurality of liquid cooling units 103 are arranged in the prefabricated cabin. The units 103 are arranged one by one at the bottom of the multiple battery clusters 102a, and the liquid outlets of the multiple cooling pipes in the same battery cluster 102a are connected to the liquid return port 103b of the liquid cooling unit 103 corresponding to the battery cluster 102a through the liquid outlet branch pipe 211 in the same liquid cooling pipe 200. In the direction in which the multiple battery packs 102 are arranged up and down, the height of the top of the liquid outlet branch pipe 211 is equal to or higher than the height of the liquid outlet corresponding to the battery pack 102 located at the top layer in the battery cluster 102a corresponding to the liquid outlet branch pipe 211.

[0049] In the above energy storage system 100, since each liquid outlet branch pipe 211 is connected in parallel with a visual tube 214, and the visual tube 214 is connected to the top of the corresponding liquid outlet branch pipe 211, the liquid level and bubble situation inside the corresponding liquid cooling pipe 200 can be observed through each visual tube 214. In addition, since the height of the top of the liquid outlet branch pipe 211 in the arrangement direction of the multiple battery packs 102 is equal to or higher than the height of the corresponding liquid outlet of the battery pack 102 located at the top layer in the corresponding battery cluster 102a, during the liquid filling process, the operator can intuitively and accurately judge whether the coolant fills the corresponding liquid cooling pipe 200 and whether there is air trapped in the corresponding liquid cooling pipe 200 through the visual tube 214, thereby ensuring the reliability of liquid filling. In addition, during the after-sales inspection process, it is also possible to visually observe through the visual tube 214 whether the corresponding liquid cooling pipe 200 needs to be replenished and whether there is leakage in the corresponding liquid cooling pipe 200, thereby helping to improve the inspection efficiency.

[0050] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A liquid cooling pipeline, characterized in that: include: The liquid outlet pipeline comprises a liquid outlet branch pipe and a visual tube, the liquid outlet branch pipe has a bottom and a top, the bottom of the liquid outlet branch pipe is used to communicate with the return liquid port of the liquid cooling unit, and the liquid outlet branch pipe is also used to connect the liquid outlets of multiple cooling pipes in the battery cluster, the liquid outlet branch pipe is arranged in parallel with the visual tube, and one end of the visual tube is connected to the top of the liquid outlet branch pipe.

2. The liquid cooling pipeline according to claim 1, characterized in that: The inner diameter of the visual tube is smaller than the inner diameter of the liquid outlet branch pipe.

3. The liquid cooling pipeline according to claim 1, characterized in that: The liquid outlet pipeline also includes a plurality of liquid outlet branch pipes, which are arranged at intervals along the extension direction of the liquid outlet branch pipe and are all connected to the liquid outlet branch pipe. The plurality of liquid outlet branch pipes are connected to the liquid outlets of the plurality of cooling pipes in a one-to-one correspondence.

4. The liquid cooling pipeline according to claim 1, characterized in that: The liquid outlet pipeline also includes a liquid return quick intubation tube, one end of which is connected to the bottom of the liquid outlet branch pipe, and the other end is provided with a liquid return quick plug, and the liquid return quick plug is connected to the liquid return port.

5. The liquid cooling pipeline according to claim 1, characterized in that: The liquid cooling pipeline also includes a liquid inlet pipeline, which includes a liquid inlet branch pipe and a detection tube. The liquid inlet branch pipe has a bottom end and a top end. The bottom end of the liquid outlet branch pipe is used to communicate with the liquid filling port of the liquid cooling unit. The liquid inlet branch pipe is also used to connect the liquid inlets of the multiple cooling pipelines. The top end of the liquid inlet branch pipe is connected to the detection tube, and the detection tube is provided with an observation window.

6. The liquid cooling pipeline according to claim 5, characterized in that: A liquid level sensor is arranged in the detection tube, and the liquid level sensor is electrically connected to the liquid cooling unit. When the liquid level sensor detects that the liquid level of the coolant in the liquid inlet pipeline is lower than a predetermined height, the liquid cooling unit can control the liquid cooling unit to inject liquid into the liquid cooling pipeline.

7. The liquid cooling pipeline according to claim 6, characterized in that: The liquid level sensor is also used to be electrically connected to the battery management system. The liquid level sensor can control the battery management system to send a warning signal when the liquid cooling unit continues to inject liquid into the liquid cooling pipe and the liquid level is maintained below the predetermined height.

8. The liquid cooling pipeline according to claim 5, characterized in that: The liquid inlet pipeline also includes a plurality of liquid inlet branch pipes, which are arranged at intervals along the extension direction of the liquid outlet branch pipe and are all connected to the liquid inlet branch pipe. The plurality of liquid inlet branch pipes are connected to the liquid inlets of the plurality of cooling pipes in a one-to-one correspondence.

9. The liquid cooling pipeline according to claim 8, characterized in that: The liquid inlet pipeline also includes a liquid injection quick cannula, one end of which is connected to the bottom end of the liquid inlet branch pipe, and the other end is provided with a liquid injection quick plug, which is connected to the liquid injection port.

10. An energy storage system, characterized in that: The invention comprises a cabin body, a plurality of battery clusters, a plurality of liquid cooling units and a plurality of liquid cooling pipes according to any one of claims 1 to 9, wherein the cabin body forms a prefabricated cabin, the battery cluster comprises a plurality of battery packs arranged vertically, a cooling pipe is arranged in the battery pack, the plurality of battery clusters are arranged in parallel in the prefabricated cabin, the plurality of liquid cooling units are all arranged in the prefabricated cabin, and the plurality of liquid cooling units are arranged one by one at the bottom of the plurality of battery clusters, the liquid outlets of the plurality of cooling pipes in the same battery cluster are connected to the liquid return port of the liquid cooling unit corresponding to the battery cluster through the liquid outlet branch pipe in the same liquid cooling pipe, and in the direction in which the plurality of battery packs are arranged vertically, the height of the top of the liquid outlet branch pipe is equal to or higher than the height of the liquid outlet corresponding to the battery pack located at the topmost layer in the battery cluster corresponding to the liquid outlet branch pipe.

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